Centrifugal extractor.



Patented Oct.l 7, |902.`

H. A. PETERSON.

GENTRIFUGAL EXTRACTUR.

(Apyliction filed Mar. 24, 1902.)

(lo Model.)

UNiTEIo STATES PATENT OFFICE.

IIENNING A. PETERSON, OF HONOLULU, TERRITORY OF HAWAII.

CENTRlFUGAL EXTRACTOR.

SECIFICATION forming part of Letters Patent No. r710,607', dated October 7, 1902.

Application tiled March 24,1902. Serial No. 99,744. (No model.)

To (0N, whom, t nul/y 0077/0071711:

Beit known that l, I-IENNING A. PETERSON,

a citizen of the United States, residing at Honolulu, Territory of Hawaii, have invented certain new and useful Improvements in Oentrifugal Extractors; and I hereby declare the following to bea full, clear, and exact deseription of the same, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to contrifugal machines for extracting liquid from granular substances, such as syrup from sugar, and to certain useful improvements in such ma chines whereby their action is rendered continuous.

My improvements consist in a revoluble vessel, double-walled, having a narrow annulus around the periphery and a radial converging throatway outward from the center communicating with this anuulus, perforations and screens through which liquids can pass, with means to collect and discharge the solid and liquid parts and with other features and accessories, that will be more completely explained by the aid of the accompanying drawings, forming a part of this specification.

Figure I is a vertical section through a centrifugal extracting-machine constructed according to my invention, and Fig. II a plan view of the same machine.

The objects of my invention are to attain a continuous action of centrifugal extracting machines, also a more rapid and effective treatment of the substance to be drained and dried.

In centrifugal extracting machines for treating Wet sugar, to which process the present description will hereinafter' be confined, a revoluble vessel is partially filled with a charge of Wet sugar and set in rapid revolution, so the syrup contained in the sugar is driven outward through the sugar by centrifugal force and through a screen and perforations in the perimeter of the vessel, after which the charge is removed and a fresh one added. In this manner the syrup has to be driven through a deep stratum of sugar closely packed by centrifugal force, and this force being as the radius or distance from the center is unequal throughout the mass of sugar. Consequently the action is not uniform and is slow, because intermittent. To evade these impediments, I employ the usual revoluble vessel l, mounted on a vertical shaft 2 and provided with perfor-ations 3 around the periphery. Inside this vessel 1 I place a second vessel 5, attached by the struts 6, open in the center to receive the wet sugar that is supplied through a pipe 7 and is dished to form an annular converging throatway 8, as shown in Fig. I. From these converging throatways S the vessel 5 conforms in shape to the main one l, forming a concentric annulus 9, through which the sugar is forced by pressure of the mass in the throatways 8 and in the radial or horizontal portion of the annulus 9. The outer or main Wall of the annulus 9 is covered on the inside with a screen l0, having fine meshes to prevent the passage of sugar and its escape through the larger perforations 3 in the wall of the main vessel. The drained sugar when discharged from the top of the annulus 9 is caught by the external housing l2, as indicated by arrows in Fig. I, and descends to a place of deposit, While the liquid portion is driven through the screen 10 and perforations 3 and is caught in the annular chamber 13 and drains off through a pipe li. The inner member or vessel 5 is also perforated around. its upper portion, as shown at l5 in Fig. I, and a pipe 17 supplies water that when driven out by centrifugal force through the perforations l5 and through the stratum of sugar in the annulus 10 washes out any molasses that remains therein. I also provide, by preference, an annular air-chamber 1S around the top of the inner vessel 5 with inlets provided with raised lids 19. The rapid revolution of the vessel 5 draws in air through said inlets, that yis forced through the perforations 20 and eX- pels through the screen l0 any molasses remaining in the sugar at this point. An annular ledge 22 prevents the escape of molasses over the rim of the chamber 13.

It will be understood that the same devices with slight modification can be applied to extracting continuously liquids or moisture from any granulated or comminuted substance and that the axis of the machine may be either vertical, as shown, or set in a horizontal position.

Having thus explained the nature and ob- ICO jects of my invention and the manner of its application, what I claim as new, and desire to secure by Letters Patent, is-

l. In a centrifugal extracting-machine, in combination, a revoluble main vessel of cylindrical form, having a perforated wall, a second cylindrical Vessel concentric with and secured within said main Vessel forming an annular vertical space between the two, the bottom of said inner Vessel being an opencentered conically-inclined plate, forming an annular throatway communicating with said annular vertical space, means for supplying the material to be treated to said throatway, and concentric cylindrical walls surrounding the main vessel, forming separate annular chambers for the reception of the liquid and solid separated portions respectively, subsfantially as specified.

2. In a centrifugal extracting-machine, in combination, a revoluble main Vessel having a perforated vertical wall, a second vessel arranged concentrically therein and secured thereto, forming an annular space between the two, an open-centered conically-inclined plate forming an annular throatway radially converging outward into said annular space,

plate forming au annular throatway radially converging outward into said annular space, a foraminous screen in said annular space, and means for supplying the material to be treated to said throatway, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HENNING A. PETERSON.

Witnesses: Y.

ALFRED A. ENQUIST, P. W. J. LANDER. 

